I'm an unabashed fan of the Drakensberg Boys' Choir and ever since I first saw it I think of this video every time I think of them. It's short, 29 seconds long, but it captures perfectly why they're such a great choir. It was shot back stage on May, 12th 2010 at Seoul Art Center as they made their way to the changing rooms after their first concert of their 2010 Asian Tour. They'd just made the flight to Korea, they'd just given their first concert, so you'd expect them to be exhausted wouldn't you?
Video Source: Drakensberg Boys' Choir in Seoul - YouTube